OO Help -> node's and stuff

[Mr_Invisible]

Hello all,
I'm working on a directory browser (think Windows Explorer etc), and I'm at the stage of getting a list of folders under a root folder. I had this working before by placing folders in a large multi-dimensional array, but this got messy when it came to structuring it later. So then I tried a OO approach, using a Node object to represent a folder. Adding Nodes manually worked (nested nodes etc), but when it came to building the node list in a recursive method, it doesn't work. It doesn't seem like an impossible thing to do so can anyone point out where I'm going wrong?
class.Node.php

<?php

class Node {

var $name;
var $parent;
var $parentName;
var $children;

function Node($name) {
	$this->name = $name;
	$this->children = array();
}

function setParent($node) {
	$this->parent = $node;
	$this->parentName = $node->name;
}

function setChild($node) {
	array_push($this->children, $node);
	// echo "Size: ".sizeof($this->children)."<br>";
}

function printChildren() {
	// echo "Root: ".$this->name."<br><blockquote";
	for ($i=0; $i<sizeof($this->children); $i++) {
		$tNode = $this->children[$i];

		echo $tNode->name." (".sizeof($tNode->children).")<br>";

		if ($tNode->hasChild()) {				
			echo "<blockquote>";
			$tNode->printChildren();
			echo "</blockquote>";
		}

	}
	// echo "</blockquote<br>";
}

function hasChild() {
	if (sizeof($this->children) >= 1)
		return true;
	else
		return false;
}

function getChildren() {
	return $this->children;
}

}

?>

And the other file (relevent sections):

<?php

require_once("class/class.Node.php");


$rootNode = new Node("Members");
$rootNode->setParent($rootNode);

$path = "/somewhere/to/something";

$rootNode = tree($rootNode, $path, 3);

echo "<p>";
$rootNode->printChildren();
$rCount = 0;


function tree($rootNode, $directory, $maxDepth = 5) {
	global $rCount;
	$currDepth = $rCount;

if ($currDepth <= $maxDepth) {
	if ($handle = dir($directory)) {
		while ($file = $handle->read()){
			$nPath = $directory."/".$file;
			if ($file != "." && $file != ".." && $file != "CVS" && is_dir($nPath)) {

				$tNode = new Node($file);
				$tNode->setParent($rootNode);
				$rootNode->setChild($tNode);

				echo $directory."/".$file.", Node: ".$tNode->name.", parent: ".$tNode->parentName."<br>";
				echo "(ROOT) name: ". $rootNode->name ." parent: ".$rootNode->parentName."<br>";
				$rootNode->printChildren();

				$rCount ++;
				tree(&$tNode, $directory."/".$file, $maxDepth); 
			}
		}
	}
} 
return ($rootNode);	
}

?>

(note: recursion control probably doesn't work, so you may want to try that at your own risk 😉 )

Ideally when the printChildren() is called from the rootNode, it should print out a nicely indented list of all the subfolders under the root. At the moment, the rootNode doesn't seem to be storing the childNodes that are more than 1 directory deep, only the first level. ie. Output:
/Root/Dir1 (0)
/Root/Dir2 (0)